Weft stop-motion for looms.



PATENTED SEPT. 24, 1907.

W. A. GRANT. WBFT STOP MOTION POR'LOOMS'.

APPLICATION FILED JAN.11,1907.-

2 SHEETS-SHEET 1.

ATTORNEYS.

THE NORRIS PETERS co, W'A'sumcwu, p. Q

PATENTBD SEPT. 24, 1907.

. w. A. GRANT.

-WEFT STOP MOTION FOR LOOMS.

APPLICATION FILED JAN.11, 1907.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR 77M ATTORNEYS rm: name's PETER: 00., wAsnmm-an, n c.

PATENT oFFIoE.

WILLIAM A. GRANT, OF PATERSON, NEW JERSEY.

WEFT STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed January 11, 1907. Serial No. 351,806,

To all whom it may concern:

Be it known that 1, WILLIAM A. GRANT, a citizen of the United States, residing in Paterson, county of Passaic, State of New Jersey, have invented certain new and useful Improvements in Weft Stop-Motion for Looms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to looms and particularly to devices used in connection therewith for detecting the absence or substantial absence of the welt thread or filling, and in devising the mechanism constituting the same and herein set forth I have had particularly in mind to make the parts thereof not only promptly responsive to the conditions under which they are designed to operate but delicately engageable with the weft thread, it being obvious that the constant friction which such devices are required to have with the weft thread must, if accompanied by undue pressure, result 7 in so affecting the thread that imperfections will accrue in the fabric into which it is woven; other objects will appear hereinafter in this specification wherein my invention is fully set forth in connection with the accompanying drawings, wherein,

Figure 1 is a view, partly in side elevation and partly in longitudinal section, of a loom provided with myimproved weft stop motion mechanism, the parts being in the position occupied during the fiight of the shuttle; Fig. 2 is a plan of what is shown in Fig. 1, the batten and the parts thereon being omitted; Fig. 3 is a view like Fig. 1, except that the parts are shown in the position occupied after the stopping of the loom through detection of the absence of filling; Fig. 4 is a plan of the parts of the mechanism carried by the batten; Fig. 5 is a front view of said parts; and, Fig. 6 illustrates a modification.

In the drawings, a is the loom frame, b the batten carried by the lay-swords c, d the breast-beam, c the shuttle, f the reed, g the controller which, as usual, is a lever mounted in the frame and guided by a bracket 1', and 7a a rock-shaft journaled in the breast-beam and adapted to throw said lever, whereby to shut off the power, by means of a crank Z having a projection m ongageable with the lever; said crank land another crank h are adjustably secured on the shaft by means of setscrews a.

To the back of the breastbeam are attached L shaped brackets 0 and p, the horizontal portion of the bracket 0 affording at q a pivot for a lever r and the horizontal portion of the bracket p serving as a rest for said lever. This lever, when forced toward the breast-beam, will engage the crank h and, thereby rocking shaft k, will cause crank Z to effect the shifting of the controller.

8 is a clip secured to the under side of the lever r by bolts t and engaging bracket p for holding lever 1" down on the bracket, and a is an L-shaped plate attached to the end of the lever by bolts 1), its portion w being turned up at a slight incline. The parts 8 and u are made adjustable longitudinally of the lever by a slot at in the latter which their bolts penetrate.

The lever r is limited in its movement toward the batten by a stop consisting of an elastic pad y surmounted by a plate 2 and secured to the bracket p by bolts lwhich penetrate a slot 2 in the bracket p and thus permit adjustment of the stop in the direction of play of the lever r; the plate z is wider than the pad y, so that when the lever is against the pad the plate overlaps the lever slightly.

3 is a threaded pin secured in the slot 2 by a nut 4 and carrying on its upper end an arm 5 "adjust-ably secured to the pin by a set-screw 6. A plate 7 is attached to the end of the arm 5, being inclined downwardly and forwardly and its free end being overlapped by the plate w.

8 is a bracket secured to the front of the batten and having a recess 9 at the top forming a continuation of the recess 10 in the batten which receives the weft fork 11 when the latter is depressed. The top of the bracket carries a U-shaped plate 12 (Fig. 4) permitting the play of the weft-fork while it limits its upward movement. The weft-fork comprises a barrel 13 which has a bearing on a pin 14 secured in the head of the bracket by a set-screw 15. The head of the pin is a bent wire 16 soldered thereto and the function of which will be hereinafter set forth.

In the lower part of the bracket is secured, by a setscrew 17, a pin 18 on which is pivoted ahook 19 whose hooked (rear) end rides on the plate 7 and is adapted, when the weft is absent, to engage the plate 11. and move lever r. The hook is connected to the barrel of the fork by a link 20 which consists of a wire having its upper end bent off at right angles and extending into an eccentric point of the barrel and its lower end turned off at right angles in the other direction and penetrating one of the holes 21 in the hook 19. The link 20 being on corresponding sides of the pivots of the weftfork and hook, and the longer arms of these parts being on the other side of their pivot, gravity tends to hold the weft fork down. 22 is a spring having one end extended under the front end of the hook 19 and its other end coiled about the pin 18 through which its extremity is passed. As shown in Fig. 3, this spring only acts on the system of parts comprising the weft-fork, the link and the hook while the weft-fork is somewhat above the plane of the weft thread; when the weft fork is in a position below this, the hook leaves the spring, with the result that gravity alone is acting on moves forward and back the system of parts comprising the weft-fork, the link and the hook is vibrated by the plate 7 on which the hook rides; when the batten moves back the fork is elevated to permit passage of the shuttle, and when the batten moves forward the fork drops and is supported by the weft thread, which thus keeps the hook 19 above the plate a so that the hook will not cause the shifting of the lever r. Should, however, the weft thread be absent under the weftfork, the weft-fork will be allowed to enter the recess 10 in the batten and this will bring the hook 19 down low enough so that it will engage the plate a as it rides down the plate 7 and move lever r until the latter engages the crank it and, through shitting shaft It stop the loom in the manner already described The bent wire 16 holds the upper end of the link in the barrel of the fork, while the lower end 01' the link is held in the hook 19 by the adjoining face of the bracket.

A spring 23 may be employedto normally hold the lever 7' against the pad y.

The hook 19 may be vibrated from its forward end instead of its rearward end as shown in Fig. 6, where 24 is the hook having a laterally projecting pin 25 on the forward side of its pivot, and 26 an inclined plate carried by the bracket p and adapted to be engaged on the under side thereof by the pin 25; in this instance, the plate 26, must, as shown, be inclined reversely to the plate 7 so as to secure the desired elevation of the welt-fork when the batten moves back.

Having thus iully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. The combination, with the batten, the breast-beam and the controller of a loom. ot' a system of vibratory parts arranged on the batten and comprising the wett-fork and a hook, means, actnative from said system of parts and comprising a horizontally movable lever, for actuating the controller, said lever being arranged to be engaged by the hook when the tilting is absent. a hook-actuating plate arranged in the path of movement oi said hook with the batten. said lover being arranged adjacent said plate in the plane of pivotal movement of the hook and means for suporting said plate and the lever substantially as described.

:2. The combination with the batten, the hl'eastheam and the controller of a loom. of a system of vibratory parts arranged on the batten and comprising the \vet'ttork and a hook. means actuative from said system of parts and comprising a horizontally movable lever. for actuating the controller, an inclined hook-actuating plate arranged in the path of movement of said hook with the batten. said lever being adapted to be engaged by said hook and being normally arranged to overlap the plate. and means for supporting said plate and the lever, substantially as described.

In testimony, that; 1 claim the foregoing. l have here unto set my hand this 7th day of January. 1907.

WILLIAU A. (tltAN'l.

Witnesses .Tonx W. S'rrnvann, 

